Transferring speculative data in lieu of requested data in a...

Electrical computers and digital processing systems: memory – Storage accessing and control – Hierarchical memories

Reexamination Certificate

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Details

C711S113000, C711S112000, C711S158000, C369S030010, C369S030230

Reexamination Certificate

active

07346740

ABSTRACT:
Method and apparatus for transferring speculative data in lieu of requested data in a data transfer operation. First data are transferred in response to an execution of a first pending command. Speculative data are transferred instead of second data associated with a second pending command during a next available latency period for the second data, preferably when the speculative data are adjudged as having a utility greater than a utility of the second data. The first and second commands are preferably received in a queue and a command execution algorithm identifies the second command as a next best command to be executed after execution of the first command. The above steps are preferably carried out by a controller of a data storage device.

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The Cache Memory book, Jim Handy, Academic Press, Inc., 1993, pp. 5-8 and 64-84.

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